According to a study by the RAND corporation that appears in last month's Journal of the American Medical Association, while advances in genomic medicine have been vast, primary care physicians feel woefully under prepared to integrate genetics into their practice. This includes having neither the time nor the skill necessary to obtain and interpret family histories that may detect disease patterns that merit a referral for genetic testing. There are also very few experts available to meet growing demand.
Additionally, there have been no studies showing if genetic testing does prevent the disease. There are also no studies showing what might be the est system for providing genetic services fr chronic adult illnesses.
Steve - while all of the above is evident, the most important point is that researchers still do not have all the information they need to know how multitudes of genes, not just one or two, increase one's risk of chronic disease. That will take many more years.